Figure 6b: The 2D MDS solution for all subjects. Symbols: o -- true configuration; x -- configuration derived by MDS from the subject data, then Procrustes-transformed [Borg and Lingoes, 1987] to fit the true one. Lines connect corresponding points. The coefficient of congruence between the MDS-derived configuration and the true one was 0.99 (expected random value, estimated by bootstrap [Efron and Tibshirani, 1993] from the data: 0.86+-0.03, mean and std dev; 100 permutations of the point order were used in the bootstrap computation). The Procrustes distance between the MDS-derived configuration and the true one was 0.66 (expected random value: 3.14+-0.15).